| 熊正强.合成锂皂石用作钻井液造浆材料实验研究??[J].地质与勘探,2019,55(1):178-186 |
| 合成锂皂石用作钻井液造浆材料实验研究?? |
| Experimental studies of laponite used as mud-making material for drilling fluid |
| 投稿时间：2017-07-04 修订日期：2018-01-16 |
| DOI：10.12134/j.dzykt.2019.01.018 |
| 中文关键词: 合成锂皂石 造浆材料 分散性 抗高温 水基钻井液 |
| 英文关键词: laponite, mud-making material, dispersibility, high temperature tolerance, water-based drilling fluid |
| 基金项目:国家青年科学基金项目（编号：41502345）和国土资源部公益性行业科研专项（编号：201411094-2）联合资助 |
|
| 摘要点击次数: 1838 |
| 全文下载次数: 891 |
| 中文摘要: |
| 高温下水基钻井液中膨润土颗粒会发生高温分散或高温聚结作用，从而导致钻井液性能发生剧变，针对这一问题，开展了合成锂皂石用作钻井液造浆材料实验研究。采用X射线粉晶衍射、扫描电镜及红外光谱对合成锂皂石H-6样进行了结构表征，对其分散性、抗盐性及抗温性能等进行了评价，并分析了合成锂皂石抗高温增稠机理。试验结果发现：合成锂皂石H-6样层间存在Na+与Li+两种阳离子，其阳离子交换容量（CEC）为156.52mmol/100g，而且远高于钠膨润土的CEC值；合成锂皂石极易分散在水中，能明显提高水相的黏度，而且不受水化时间及水化温度影响。例如，当H-6加量从0.5%增加至4%时，其分散体系的表观黏度从1.5mPa?s增加至63.5mPa?s；随着温度增加，合成锂皂石分散体系的表观黏度呈先增加后基本不变趋势，未出现高温明显增稠或高温减稠现象。例如，2%H-6分散体系在180~240℃高温老化后，其表观黏度在22~24mPa?s变化；合成锂皂石H-6样与其它处理剂配伍性好，采用其作为造浆材料配制的超高温水基钻井液具有优良的抗高温稳定性及高温流变性能，无需添加抗高温增黏剂及抗高温稀释剂来调整钻井液的流变性能。研究结果表明，合成锂皂石具有优良的抗高温分散性能，适合用作抗高温造浆材料，用于配制超高温水基钻井液。 |
| 英文摘要: |
| Bentonite particles in water-based drilling fluid can experience high temperature dispersion or high temperature coalescence under high temperature, which results in the drastic changes of drilling fluid performance. Therefore, laponite has been studied as a mud-making material for drilling fluid. Laponite H-6 has been characterized by XRD, SEM and FTIR, and the dispersibility, salt resistance and temperature resistance of H-6 have also been evaluated. In addition, the thickening mechanism of laponite under high temperature has been analyzed. Experimental results show that these exist Na+ and Li+ in the layer of laponite, and its CEC is 156.52mmol/100g. Laponite is easily dispersed in water, obviously increases the viscosity of aqueous phase, and not affected by hydration time and hydration temperature. For instance, as the concentration of H-6 increases from 0.5% to 4%, the apparent viscosity value of laponite dispersions increases from 1.5mPa·s to 63.5mPa·s. Laponite displays a tendency of increasing first and then keeping almost invariably with the increase of temperature, and phenomenon of high temperature thickening or high temperature coalescence does not occur. For example, the apparent viscosity of 2% H-6 dispersion changes between 22mPa·s and 24mPa·s after hot rolling at 180~240℃for 16h.Furthermore, laponite H-6 has good compatibility with other additives, and a kind of ultra-high temperature water-based drilling fluid prepared by using laponite H-6 as mud-making material has excellent high temperature stability and rheology without adding high temperature resistant viscosifier and thinner. Research results indicate that laponite H-6 has excellent high temperature resistant dispersibility and promising application as high temperature mud-making material to prepare ultra-high temperature water-based drilling fluid. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
